In gravitropism, the plant root bends. This bending
A) occurs in the root cap.
B) occurs in the zone of elongation.
C) is mediated by gibberellins.
D) is a response to darkness.
E) involves the uptake of Ca2+ from the soil.
Correct Answer:
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Q7: Which of the following growth responses is
Q8: Phototropism in plants is the
A) bending of
Q9: The plant hormone, indole-3-acetic acid (IAA) is
Q10: Amyloplasts contain
A) auxin.
B) plastids.
C) root cap cells.
D)
Q11: The compound known as 2,4-D
A) is a
Q13: IAA produces a phototropic response in plants
A)
Q14: IAA is thought to be involved in
Q15: The plant hormones known as cytokinins are
Q16: Synthetic growth retardants
A) reduce vegetative plant growth.
B)
Q17: In addition to stem elongation, gibberellins are
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